Snap-switch.



F. 0'. DE REAMER.

SNAP SWITCH.

APPLICATION FILED JULY 17,1908.

' Patented Apr. 9, 1912.

Witnesses Inventor Frak C. Deeamer,

@QAZZM N1 ST FRANK DE REAMER, 0F SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW SNAF-SWITCH.

Specification of Letters Patent.

- Patented Apr. 9, 1912.

Application filed July 17, 1908. Serial No. 443,967. 7

To all whom it may concern:

Be it known that LFRANK C. DE ltnAMnR, a citizen of the United States, residing at Schenectady, county of Schenectady, State a switch as will appear fully from the fol-' lowing description and claims, taken 1n con nection with the accompanying drawing, in which- -.1 I

Figure 1 is a top plan viewwith 'the knob and cover removed; Fig. 2 is a side elevation, with the cover in. section; Figs. 3 and 4; are diametrical sections on the lines 33, 4-4, respectively, of Fi .1; Figs. 5 and 6 are plan views of the catc -plate and its actuating cam, in two positions; and Fig. 7 is an exploded view of the mounting of the switch blade.

The base 1 is of molded insulation and has an elevated rim 2 on which are secured the stationary contacts 3, each having a binding screw 4 whose axis is perpendicular to said rim, so that it can be manipulated from the front of the switch by a screw driver held perpendicular to the plane of the base. This is a matter of great convenience when the switch is located in a corner or close to 4 a deep molding.

At the center of the base is a bushing 5 in which isjournaled the spindle 6 having a knob 7 screwed on its up. er. end. Concentric with the spindle is the stationary ratchet-plateS having a polygonal foot 8 fitted-into a recess iii-the base, which prevents said plate from turn-in Immediately above the ratchet-plate is the catchplate 9 having a downwardly projecting lug or catchy adapted to coiiperate with the teeth of the ratchet. in said catch-plate is an opening, having a circular outline 10 for some 250 degrees of arc, struck from a center eccentric to the spindle; the remainder of its outline being a reie'ntrant angle. 10' extending well in toward the center. In this opening is located a cam 11 having a circular periphery covering some 160 degrees of arc. Said cam lies in the plane of the catch-plate and is secured to the spindle, preferably by flattening said spindle to fit a nearly semicircular hole in the cam whose circular edge is concentric with the spindle. The catchplate is fitted to slide between flanges 12 on a guide-plate 13 which is loosely pivoted on the spindle and carries the two-armed switch-blade 14 which cooperates with the contacts 3. The mode of mounting this blade is shown in-Figs. 4 and 7. On opposite sides of the guide-plate are holes 15 countersunk on the under side. Resting on the plate in line with each hole are two superposed washers 16 of insulation each havin a rabbet; the rabbeted portions being in contact. Through the washers and the hole in the plate passes a tubular rivet 17.

The switch blade 14 is preferably com posed of two superposed plates having, a large central opening, at opposite sides of which are semicircular notches 18, of a diameter equal to that of the rabbeted portions of the washers. After said washers are assembled on the tubular rivet, they are slipped laterally into the notch 18. The holes 15 in the guide-plate are then engaged with the projecting ends .of the rivets, which are then headed down in the countersinks in the under side of said plate. In this way, the blade is securely attached to the guidelate and insulated therefrom. The assemling of the-washers, rivets and blades is easily and quickly accomplished. The two ortions of the switch-blades pass respecively above and below the stationary contacts- 3, as clearly shown in Fig. 3, thereby .guideziplate, and at the other end to a U- shape collar 21 forced transversely upon a flattened portion of the spindle. A brass bushing 22 may be interposed between the spring and the spindle. The cover 23 which incloses the parts may be continuous; or it may have an opening therein to disclose a dial 2% bearing the words, On Ofi This dial is an annular disk of sheet metal having on its under side two pins 25, which enter the tubular rivets 17. Each pin has a collar 26 which abuts against the under side of the disk, and its upper end is headed down upon the upper side of said disk. The dial thus made can be mounted by simply dropping the pins into the tubular rivets '17 resting thereon, a switch-blade having an 20 which secure the blade to the guide plate. opening provided with lateral notches en- In this way, an indicating switch can be gaging said washers, tubular rivets securing made from a non-indicating switch without together said washers,b1ade and plate, and 5 the necessity of using any tools to take it a dial having pins entering said tubular apart. V rivets. i

What I claim as new and desire to secure 3. In a snap switch, the combination with by Letters Patent of the United States, is, a switch-blade, of rabbeted washers of insu- 1. In a snap switch, the combination with laticn engaging said blade, tubu1ar rivets by the guide-plate, of oppositely rabbeted which said washers are mounted, and a dial washers, of insulation resting thereon, a having pins detachably inserted in said 30 switch blade of two counterpart spring rivets. v members having an opening provided with In witness whereof lghave hereunto set lateral potchfs engaging thie raibbleted pormy hand this 16th day of Ju1y,-1908. tions 0 sai was ers, an tu uar rivets i for fastening together said plate, washers FRANK and the members of the switch blade. Witnesses: 2. In a snap switch, the combination with BENJAMIN B. HULL, the guide-plate, of washers of insulation HELEN ORFORD.

Copies of this patent may be obtained for five cents each,- by, addressing the Commissioner of Patents.

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